--- a/loadandplot.xml	Fri Aug 04 17:49:39 2017 -0400
+++ b/loadandplot.xml	Fri Oct 06 16:39:48 2017 -0400
@@ -15,9 +15,8 @@
       regionsgalaxyids='c(${region_galaxyids})'
       #set region_names = '|'.join( [ str( $r.name ) for $r in $regions ] )
       regionsfilenames='${region_names}'
-      #set region_header = $regionsheader
-      #if $region_header != "":
-        regionsheaderfile='${region_header}'
+      #if $regionsheader:
+        regionsheaderfile='${regionsheader}'
       #end if
       
       #set feature_paths = '|'.join( [ str( $f ) for $f in $features ] )
@@ -26,9 +25,8 @@
       featuresgalaxyids='c(${feature_galaxyids})'
       #set feature_names = '|'.join( [ str( $f.name ) for $f in $features ] )
       featuresfilenames='${feature_names}'
-      #set feature_header = $featuresheader
-      #if $feature_header != "":
-        featuresheaderfile='${feature_header}'
+      #if $featuresheader:
+        featuresheaderfile='${featuresheader}'
       #end if
 
       smoothing="'${conditionaltype.smoothing}'"